Shoe-calk.



' J. S. KERR.

SHOE GALK.

APPLICATION FILED DEO.22,190 8.

925,638. Pat ented June 22,1909.

JAMES SAMUEL KERR, OF DAVIS, WEST VIRGINIA.

SHOE-CALK. 7

Specification of Letters Patent.

Application filed December 22, 1908.

Patented June 22, 1909.

Serial No. 468,883.

To all whom it may concern:

Be it known that I, JAMES SAMUEL KERR, a citizen of the United States,residing at Davis, in the county of Tucker and State of West Virginia,have invented a new and useful Shoe-Calk, of which the following is asIpeoification.

t is the object of the present invention to provide an improved form ofshoe calk, and more particularly a calk which is especially well adaptedfor application to rubber boots or shoes, such as are worn by lumbermen,and the novelty of the invention resides in the feature of soconstructing the calks that when applied to the sole of a rubber shoe orboot they will not be liable to become torn therefrom, and will be soheld as to be at all times efiective.

A further object of the invention is to increase the base area of thecalks without materially increasing their weight or cost of manufacture,this being accomplished preferably by so forming the clenching orattaching prongs of the calks that they will in themselves, whenclenched to the sole of the shoe or boot, afford additional base area.

In the accompanying drawings, Figure 1 is a perspective View of one ofthe calks embodying the invention. Fig. 2 is a sectional view through aportion of a shoe sole showing the manner of applying the calk thereto,Fig. 3 is a vertical sectional view in detail through the calk. Fig. 4is a similar view but taken in a horizontal plane through one of theattaching prongs of the calk. Fig. 5 is a view similar to Fig. 1illustrating a slightly modified form of calk.

As shown in the drawings, the calk embodying the invention is comprisedof a head 7 which may be in the nature of a rectangular flat faced plateor disk, as indicated in the first four figures of the drawings, or maybe of skeleton form as illustrated in Fig. 5 of the drawings. In eitherof them, the head 7 is formed upon one face, which is the un der faceafter the calk has been properly applied to a boot or shoe, with a spur8 which is preferably conical in form and sharply pointed and projectsdownwardly axially from the said head, the said spur being preferablyformed of material or metal which may be hardened to a high degree, butbeing integral with the head 7 which is preferably of the same materialalthough not hardened, as however it might be if found expedient. Uponthe other face of the head 7, at each corner of the said head, there isformed a clenching or attaching rong 9 and each of these prongs has twop fane faces 10 and a face 11 which is convex from side to side, or inother words from edge to edge of the first mentioned faces. As clearlyshown in the drawings, the faces 10 of the calk extend in planes atright angles with respect to the plane of the head 7, whereas the face11 inclines toward the apex of the respective prong, so that the prongsare gradually tapered from their ends which are integral with the head 7to their extremities, and as will be observed from an inspection of Fig.3 of the drawings, the face 11 of each prong, is convexed alsolongitudinally of the prongs from a point adjacent the extremity thereofto the said extremity. When the device is being applied to the sole of aboot or shoe, the boot or shoe being of course placed upon the usuallast, the prongs will be turned over each in a direction away from theothers, and in this manner additional base area will be afforded thespurs 8, so that they will not be likely to turn or have any movementwhatsoever independently of the shoe.

From the foregoing description of the invention, it will be seen thatthere is provided a calk which may be readily and quickly ap lied to theordinary rubber shoe or boot an which is particularly well adapted forapplication to that class of boots or shoes which are worn by lumbermeninasmuch as a maximum base area is secured without incurring additionalweight.

What is claimed is 1. As an article of manufacture, a shoe calkcomprising a head having one side toothed, and a plurality of attachingprongs projecting from the other side thereof, each of the said prongshaving two plane faces and a third face convex from side to side andsubstantially from end to end.

2. As an article of manufacture, a shoe calk comprising a head havingone side toothed, and a plurality of attaching prongs projecting fromthe other side thereof, each of the said prongs having two plane facesdisposed at right angles and a third face convex from side to side andsubstantially from end to end, the last mentioned faces of the prongsbeing presented toward a common center and the edge of each prong formedbetween the two plane faces thereof extend- 5 ing at right angles fromthe face of the head upon which the prongs are formed.

In testimony that I claim the foregoing as my own, I have hereto afliXedmy signature 1n the presence of two Witnesses.

JAMES SAlVIUEL KERR.

Witnesses V]. E. VVEIMER, A Jos. KLINE.

